Just a little note on the diffs, make sure you get the ring gear the right way round, one has a cut out round the gear, this is for the front.
Also I have put 2 sets of thrust plates on each thrust race (4 plates in total), this was a tip from the Team drivers to beef this are up on the car. Also clean and thread lock the diff bolt as it has no nyloc to hold it in place, one this is done should have some beefy long lasting diffs!
Btw the X11 comes with Ceramic diff balls as std
